Cardinal George Pell says he will seek legal advice after a specially appointed member of the Vatican's commission on child protection accused him of being "almost sociopathic" and called his position "untenable".

A spokesperson for Cardinal Pell called the statements by abuse survivor Peter Saunders "false and misleading", after Mr Saunders called for Cardinal Pell to be sent back to Australia.

"From his earliest actions as an archbishop, Cardinal Pell has taken a strong stand against child sexual abuse and put in place processes to enable complaints to be brought forward and independently investigated," the spokesperson said in a statement.

"Cardinal Pell has never met Mr Saunders, who seems to have formed his strong opinions without ever having spoken to His Eminence.

"In light of all of the available material, including evidence from the Cardinal under oath, there is no excuse for broadcasting incorrect and prejudicial material.

"In the circumstances, the Cardinal is left no alternative but to consult with his legal advisers."

He has a catalogue of denigrating people, of acting with callousness, cold-heartedness, almost sociopathic I would go as far as to say, this lack of care.

Peter Saunders

Mr Saunders was appointed by Pope Francis last year to the new commission to protect children.

His comments follow the royal commission's latest hearings in Ballarat which last week focused on the crimes of priest Gerald Ridsdale.

Cardinal Pell has denied he tried to bribe a victim to keep quiet and that he was dismissive of victims and their families.

"Personally I think that his position is untenable because he has now a catalogue of denials," Mr Saunders told Channel Nine.

"He has a catalogue of denigrating people, of acting with callousness, cold-heartedness, almost sociopathic I would go as far as to say, this lack of care.

"Given the position of George Pell as a cardinal of the church and a position of huge authority within the Vatican, I think he is a massive, massive thorn in the side of Pope Francis's papacy if he's allowed to remain.

"And I think it's critical that he is moved aside, that he is sent back to Australia, and that the Pope takes the strongest action against him."

"It's imperative that the Cardinal returns to Australia at the request of the royal commission and we get to see everything laid out in full.

"Until we can get to that point, then all of the commentary around this will continue to swirl without us landing on what really happened."

Mr Sullivan said Cardinal Pell had a problem with "openly expressing his feelings", and that his concern for victims had not "come across".

"I know him at a personal level and I know that he does have lots of concerns about individuals who have been abused in the Catholic Church," he said.

"He can appear gruff and dismissive.

"And, again, he needs to explain himself in how he responds to people in an open hearing like the royal commission."

Mr Sullivan said he did not know if Mr Saunders' comments would have had the approval of the papal office, but said they had left Cardinal Pell and the Vatican in a tight position.

"As far as we are concerned here, our council wants everybody involved when they are called to turn up, to fess up, to explain," he said.

"Because we're at a time in Australia as a Catholic Church that ... we cannot afford to send any signal at any time that the Church, its image and its leadership is more important than the ... lives of those who have been abused."